Trombone is also called Changming, Tonghao, Recruiting, Blowing Horse, Horn, etc. It is a musical instrument of Yao, Zhuang, Miao, Yi, Hani, Buyi, Tujia, Uygur, Han and other ethnic groups. Yao language is called Dangyou. The Yi language is called Dabala. The Buyi language is called Manglie. The Uyghur language is Kanai. Han people call it large, long pointed, small, top number and so on. Popular in all parts of China, especially in Guangxi, Yunnan, Guizhou, Xinjiang and other provinces.

The whole body is made of thin copper sheet and consists of upper, middle and lower copper tubes. The upper section is a mouth section, with a pot-bottom-shaped mouth at the top, a telescopic section at the middle section and a trumpet section at the lower section. The tube body can be telescopic, and when not in use, the upper middle section can be retracted into the horn section, which is very convenient to carry and store. Different nations and regions have different trombone specifications and different lengths.

Yao Dangxi and Zhuang and Miao trombones are popular in western Guangxi and southeastern Guizhou. The total length of the pipe is 155 cm. The upper section is 30 cm long, the nozzle at the top is 5 cm in diameter and 0.8 cm in depth, and the copper round bag at the bottom is 6 cm in diameter. The middle section is 6 1 cm, the horn section is 64 cm, and the diameter of the horn mouth is 22 cm. When playing, pull out the upper middle section, hold the tube straight with your left hand and hold the upper section with your right hand.

The tube is slightly to the left, and the mouth is attached to a pot-shaped horn. The pronunciation is mostly pitch and one or two overtones. The voice is deep and rich, and the volume is loud, which can be heard for miles away. You don't usually play alone. In Guangxi and Guizhou, it is the bass instrument of the eight-tone band of all ethnic groups. The music played is all eight-tone music cards.